I had expected the above to result into displaying the line, waiting one second, then going on with the for-loop. It turned out to skip the timeout entirely. I tried logging it, which then displayed 1, four times, a few miliseconds after another.

Then I tried to make use of SetInterval, but that didn't give me the desired result either. Both times it set the style of the div to none straight after getting into the function, not taking the time into account.

This line is in the same function as the timeout/interval, but directly below it.

Answer:

In your first code example you are immediately setting four separate timeouts that each take one second. All four will complete at roughly the same time.

You need to set up a function that can be called once a second. Perform the countdown inside that function. Call it only once and upon completeion have it call itself again until the counter reaches zero. Like so:

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